Explain the underlying cause and consequences of an individual that develops severe combined immunodeficiency (SCID).
What will be an ideal response?
Primary immunodeficiencies are genetic in nature. Both B & T cells are lacking or nonfunctional in an individual who inherits the disorder. A child will faulty genes will lead to this disorder. After the antibodies obtained from the mother have been degraded, untreated infants usually die. Potential treatments include a bone marrow transplant to replace the faulty stem cells.
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Explain why vegetarians and vegans might be deficient in some amino acids
What will be an ideal response?
You are given the task of finding all the information that you can about a newly discovered species. Unfortunately the only material you have to study is a small tissue sample. You are able to sequence the DNA of this animal from the sample, and in doing so you find that the animal has multiple clusters of Hox genes. Without looking further, what can you conclude about this species? Check all that apply.
_____ It is a vertebrate. _____ It has the potential for tremendous structural complexity. _____ It is a chordate. _____ It is endothermic. _____ It is a primate.
The Hardy-Weinberg rule is
a. useful in determining the extent to which a sexually reproducing population is evolving. b. used to predict when genetic drift will occur in a sexually reproducing population. c. useful in determining the extent to which polyploidy is occurring in specific plant populations. d. used to predict when specific groups of organisms will become extinct. e. all of these.
The agent that causes hepatitis D is a(n) viroid that can only reproduce when the hepatitis B virus is also present
____________________ Indicate whether the statement is true or false.